Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Arterial prosthesis – Stent structure
Patent
1984-05-16
1986-07-22
Corbin, John K.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Arterial prosthesis
Stent structure
350331R, 350332, 350336, 623 4, G02F 113, A61F 116
Patent
active
046015450
ABSTRACT:
There has been provided a variable lens. In one form the lens power may be varied and in another the power may be selectively fixed in a carrier material. There are no moving mechanical parts but instead an optically active molecular material such as liquid crystals. In one embodiment, the lens and control means for varying the power of the lens are mounted on a common substrate. The lens may be a single optical element or a multi-element device such as a Fresnel lens. A variable gradient index of refraction is achievable by applying a controlled stimulus field to the lens. For example, a geometrically configured matrix of electrical voltages, each at a selected addressable location relative to the optically active material, provides the gradient in one embodiment. A thin film embodiment finds applications in magnifying glasses, cameras, telescopes, microscopes, as well as for intraocular and contact lenses for the human eye.
REFERENCES:
patent: 4010496 (1977-03-01), Neefe
patent: 4373218 (1983-02-01), Schachar
patent: 4385805 (1983-05-01), Channin
patent: 4435047 (1984-03-01), Fergason
Corbin John K.
Gallivan Richard F.
Tachner Leonard
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